It's a gel-like substance that contains:

* Chromatin: The genetic material of the cell, composed of DNA and proteins.

* Nucleoli: Small, dense structures where ribosomal RNA is synthesized.

* Proteins: A variety of proteins involved in DNA replication, transcription, and other nuclear functions.

* Enzymes: Enzymes that catalyze the reactions involved in nuclear processes.

It's important to note that nucleoplasm is not a true liquid, but rather a viscous fluid that allows for the movement of molecules and other structures within the nucleus.